发明授权
- 专利标题: Timing lock detection apparatus and method for digital broadcasting receiver
- 专利标题(中): 数字广播接收机定时锁定检测装置及方法
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申请号: US11635721申请日: 2006-12-07
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公开(公告)号: US07933322B2公开(公告)日: 2011-04-26
- 发明人: Eun-Seok Jin , O-Hyung Kwon , Soo-In Lee
- 申请人: Eun-Seok Jin , O-Hyung Kwon , Soo-In Lee
- 申请人地址: KR Daejeon
- 专利权人: Electronics and Telecommunications Research Institute
- 当前专利权人: Electronics and Telecommunications Research Institute
- 当前专利权人地址: KR Daejeon
- 代理机构: Blakely, Sokoloff, Taylor & Zafman LLP
- 优先权: KR10-2005-0119958 20051208; KR10-2006-0091982 20060921
- 主分类号: H04B3/46
- IPC分类号: H04B3/46
摘要:
A timing lock detection apparatus and method for digital broadcasting receiver are provided. The apparatus includes: a discrete value generator for cyclically selecting a discrete signal value from a continuous timing error signal; a differential calculator for obtaining a difference between the currently selected timing error signal value and a previously selected timing error signal that is a timing jitter signal; a sign variation detector for detecting variation in a sign of the timing jitter signal; a lock control signal generator for discriminating a period based on the detected sign changing time, and controlling a lock step of the loop filter according to a convergence mode of the timing jitter signal at each period; and a lock detection signal generator for generating a lock signal or an unlock signal according to whether the timing jitter signal reaches a steady state and using the current lock step signal.
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